The purpose of this research is to achieve asphaltic concrete of much higher stability and lower thermal susceptibility. Test results showed that the addition of 5 wt% of polyethylene and of 2 wt% of a catalyst raised the softening temperature of asphalt D70 by 27.2 degree C (80.9 degree F), reduced penetration at 25 degree C (77 degree F) by 50.7 pen and increased the shear strength of asphaltic joints by 2.62 multiplied by (times) 10 to the 5th power multiplied by (times) M to the minus second power. The stability of mean-grained asphaltic concrete containing 5 wt% of polyethylene in its binder, determined by modified Marshall test, was as much as 2,720 daN (6,118 lbf) higher than that of concrete containing nonmodified asphalt. The examination of rheological properties of modified asphaltic concrete samples, performed at the temperatures of 10 degree C (50 degree F) and--20 degree C (-4 degree F), proved their increased tensile strength as well as reduced stiffness coefficient.

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  • Accession Number: 00394771
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jul 31 1985 12:00AM